Saturday, March 22, 2014

ModuleWorks MultiBlade, 5-Axis programming for impellers and bladed disks (Part 2 of 3)



In Part 2 of this article on MultiBlade, we're looking more at the blade machining process and getting into the detail of roughing the blade. 

Click here for Part 1

Machining (continued)


The first stage of the process is to select the part geometry to be machined, along with any check surfaces to be avoided (gouge checked) after which the user specifies the number of segments on the blade and in which order they are to be machined.

5-Axis tilting is essential when machining blades and impellers and MultiBlade provides dynamic tilting to automatically calculate the optimum tool orientation at any given position during the machining process.  Dynamic Tilting uses the user specified preferred tilt amount where possible, but will use the full range of available tilt where the preferred tilt cannot be used. This avoids gouging and allows access to the complete part geometry.

By default, all links between each toolpath pass and region are fully automatic and use the specified strategy and parameters to achieve the optimum linking conditions.  The automatic mode can be easily overridden giving the user complete control over links, clearance areas and distances. MultiBlade toolpaths also include specially designed edge rolling that can be controlled for both the leading and trailing edge of the blade in addition to an extension amount past each edge.

Roughing 

The roughing pattern is used to remove material between the blades, accounting for any splitters on the bladed component. Material is removed in passes and these different passes may be offset from the hub, shroud or morphed between the hub and the shroud. The latter is commonly used as it most closely follows the shape of the stock from shroud to hub. The users may specify the depth of cut or allow MultiBlade to calculate a number of evenly spaced passes. 

The video link below shows how partner GibbsCAM have integrated MultiBlade technology within their product.


In part 3, we'll be taking a look through the finishing process and then going through the 2 different licensing packages available for MultiBlade.

Until the next time

The ModuleWorks Blogger

Click here for Part 3



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